Edit: Can someone just tell me how to hook up a passive sub? I know i have 2 options. One piggybacking my speakers and the other using an external amp. Can someone tell me how to hook it up right? Original: So I am setting up my DJ equipment and until I find a new receiver, I am using some bookshelf system from college. I bought 2 JBL N Series bookshelves to use and I have a Sony Passive sub as well. So I am trying to set it up with the sub since the JBLs are 2 way, but its been so long since I set up a passive sub that I think I forgot how. I have the left speaker wire out from the receiver into the sub. Then from the sub into the left speaker, with both wires piggy backed. The right wire from the receiver directly into the right speaker. It sounds like garbage. Am I doing something wrong?